Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Air intake device for internal combustion engine

a technology for internal combustion engines and air intake devices, which is applied in the direction of air intakes for fuel, combustion-air/fuel-air treatment, machines/engines, etc. it can solve the problems of large amount of leakage air in a fully-closed state of the rotary valve, and suppress so as to prevent the flow rate of localized flow from slowing down, the effect of spreading the straight flow

Inactive Publication Date: 2011-05-12
DENSO CORP
View PDF15 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an air intake device for an internal combustion engine that can efficiently generate a straight flow (localized flow) in the intake port of the engine. The device also restrains the straight flow from spreading and slowing down, which allows for better engine performance. The device includes a duct, a housing, a shaft, and a rotary valve. The rotary valve has a valve plate that moves outside the duct and along its downstream end to change the opening areas of the air flow passages. The housing has opposed walls that follow the shape of the curved surface portion of the valve plate, which prevents air flow other than the main flow from entering the second air flow passage. This results in a more efficient and effective generation of the straight flow in the intake port of the engine.

Problems solved by technology

In this case, if a clearance formed between an inner peripheral surface of the circular curved surface of the housing and an outer peripheral surface of a circular valve element of the rotary valve is large, the amount of leakage air may become large in a fully-closed state of the rotary valve.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Air intake device for internal combustion engine
  • Air intake device for internal combustion engine
  • Air intake device for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0052]The first embodiment of the present invention is described with reference to FIGS. 1A to 3C. FIGS. 1A to 2B show a valve unit (TCV), and FIGS. 3A to 3C show a housing.

[0053]An air intake device for an internal combustion engine having multiple cylinders of the present embodiment includes multiple valve units, each of which is used as an intake air flow control valve (tumble flow control valve, i.e., TCV) housed in an intake pipe (intake duct) of the internal combustion engine (engine).

[0054]The valve unit includes a duct 1 made of synthetic resin, into which intake air which has flowed out of a throttle body or a surge tank flows, a housing 2 made of synthetic resin, which is arranged to surround the periphery of the duct 1, a rotating shaft (shaft 3 made of metal) which is rotatably supported by the housing 2, and two connecting portions 5 which are connected (support fixation) to a resin molding portion (shaft 4 made of synthetic resin), which covers the periphery of the sha...

second embodiment

[0139]The second embodiment of the present invention is described with reference to FIGS. 4A to 5. FIGS. 4A and 4B show a valve unit (TCV), and FIG. 5 shows a housing.

[0140]In the valve unit of the present embodiment, the duct 1 is inserted in and supported by the housing 2.

[0141]The housing 2 has the rectangular tube-shaped block 11, which is arranged to surround the periphery of the duct 1 in the circumferential direction, the rectangular tube-shaped block 12, which extends toward the downstream side (a side of the intake port) in the air flow direction than the downstream end of the block 11, and the like.

[0142]The upper wall 42 of the block 12 has a protruding wall (protrusion) 49, which protrudes toward the upstream side of the air flow passage 14 in the air flow direction so as to contact (adhere to) the duct protrusion 15 of the duct 1 (the downstream end of the duct 1 near the opening).

[0143]In the present embodiment, an end portion of the protruding wall 49 adheres to the d...

third embodiment

[0145]The third embodiment of the present invention is described with reference to FIGS. 6A to 7. FIGS. 6A and 6B show a valve unit (TCV), and FIG. 7 shows a housing.

[0146]In the valve unit of the present embodiment, the duct 1 is inserted in and supported by the housing 2.

[0147]The housing 2 has the rectangular tube-shaped block 11, which is arranged to surround the periphery of the duct 1 in the circumferential direction, the rectangular tube-shaped block 12, which extends toward the downstream side (a side of the intake port) in the air flow direction than the downstream end of the block 11, and the like.

[0148]The upper wall 42 of the block 12 has the protruding wall 44 that protrudes downward in the height direction from a wall surface of the upper wall 42 of the block 12. The protruding wall 44 has a protrusion 61, which protrudes toward the upstream side of the air flow passage 14 in the air flow direction so as to contact (adhere to) the duct protrusion 15 of the duct 1 (the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An air intake device for an engine includes a duct having therein a first air flow passage, a housing having therein a second air flow passage, a rotary valve having a valve plate. A block of the housing, which conducts intake air to an intake port of a cylinder head, has a circular opposed surface that follows a shape of a curved surface portion of the valve plate. Moreover, the block of the housing has a protrusion that protrudes toward an upstream side of the second air flow passage in an air flow direction so as to contact a duct protrusion of the duct. Therefore, a localized flow of the intake air, which has flowed into the second air flow passage from an opening of the first air flow passage, can be restrained from spreading, and a flow rate of the localized flow can be restrained from slowing down.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application is based on Japanese Patent Application No. 2009-258672 filed on Nov. 12, 2009, the disclosure of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to an air intake device for an internal combustion engine, which is configured to generate an intake-air vortex flow in a combustion chamber of the internal combustion engine. In particular, the present invention relates to an air intake device for an internal combustion engine, which is configured to generate a straight flow (localized flow) in an intake port of the internal combustion engine.BACKGROUND OF THE INVENTION[0003]A fluid flow amount control valve, in which a circular curved surface of a housing is arranged at the outer periphery of a rotary valve, has been proposed. For example, refer to JP4-078874 B.[0004]For example, the fluid flow amount control valve described in JP4-078874 B is used as a tumble flow cont...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F02M35/10
CPCF02B31/06F02B2275/48Y02T10/146Y02T10/125F02D9/16Y02T10/12
Inventor TAKEDA, TETSUMASANO, RYO
Owner DENSO CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com